Method of bending laminated material

ABSTRACT

A laminated material relatively large in thickness and having a curved surface of small radius, wherein a laminated material ( 170 ) as a raw material is provided in which surface plates ( 181, 182 ) are fixed to both surfaces of a core material ( 183 ) and the surface plate ( 181 ) on the internal side of an arc is not fixed to the core material ( 183 ) and, with one end side of the laminated material ( 170 ) fixed to frames ( 30, 40 ), the other end of the surface plate ( 181 ) is moved in the direction apart from the core material ( 183 ) so as to bend it in arc-shape, the other end being not fixed to the core material ( 183 ).

FIELD OF THE INVENTION

The present invention relates to a method of bending a laminatedmaterial.

DESCRIPTION OF THE RELATED ART

According to the prior art bending method, as disclosed in JapanesePatent Laid-Open Publication No. 3-222715, in order to form a small bendradius, a honeycomb panel having a core material using aramid as basematerial is mounted on a curve forming member, where it is bent andfixed, then the bent portion is heated, cooled and finished.

Further, Japanese Patent Laid-Open Publication No. 9-295050 discloses amethod for bending a panel, wherein the panel is sandwiched between ajig having a curved surface and a wing, thereby bending the panel.Japanese Patent Laid-Open Publication No. 9-201624 discloses sandwichingwith a fixed roll and a moving roll a panel having one end fixed, thenmoving the moving roll to bend the panel.

Moreover, Japanese Patent Laid-Open Publication No. 57-205661 disclosesa method for bending a laminated board, including adhering a heatinsulator to a metal plate, forming a V-shaped cut to the heat insulatoradhered to the bending portion, adhering a heat insulator to a secondmetal plate, and bending said V-shaped portion.

Japanese Utility Model Publication No. 2-8567 discloses providing aV-shaped cut to a sandwich panel from one side of the surface plate, andthen bending the same. Lastly, an L-shaped bonding member is fixed tothe surface plate having the V-shaped cut.

SUMMARY OF THE INVENTION

The method disclosed in Japanese Patent Laid-Open Publication No.3-222715 requires the use of a core material having aramid as basematerial.

The object of the present invention is to provide a laminated materialrelatively large in thickness and having a curved surface with smallradius.

The above object is achieved by the following:

-   -   while fixing to a base one end of a laminated material having a        first surface plate and a second surface plate respectively        fixed to both surfaces of a core material, moving the other end        of said first surface plate toward the direction separating from        said core material and bending the same into an arc shape;    -   applying an adhesive on either one of the contact surfaces        between the first surface plate on said other end and the core        material; and    -   moving and bending the other end of the core material and the        second surface plate along the first surface plate being bent.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a vertical cross-sectional view showing the state where amaterial panel is mounted to the bending device according to oneembodiment of the present invention;

FIG. 2 is a vertical cross-sectional view showing the state followingFIG. 1;

FIG. 3 is a vertical cross-sectional view showing the state followingFIG. 2;

FIG. 4 is a vertical cross-sectional view showing the state followingFIG. 3;

FIG. 5 is a vertical cross-sectional view showing the state followingFIG. 4;

FIG. 6 is a vertical cross-sectional view showing the state followingFIG. 5;

FIG. 7 is a vertical cross-sectional view showing the state followingFIG. 6;

FIG. 8 is a perspective view showing the whole structure of the bendingdevice according to one embodiment of the present invention;

FIG. 9 is a right side view of FIG. 8;

FIG. 10 is a left side view of FIG. 9;

FIG. 11 is a vertical cross-sectional view showing the support portionof the bending base of FIG. 9;

FIG. 12 is a right side view of FIG. 11;

FIG. 13 is a vertical cross-sectional view of a vehicle equipped withthe laminated material according to the present invention;

FIG. 14 is a vertical cross-sectional view showing the laminatedmaterial of FIG. 13;

FIG. 15 is a cross-sectional view showing the joint portion of thelaminated material of FIG. 13; and

FIG. 16 is a plan view showing the core material of the laminatedmaterial.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

A preferred embodiment of the present invention will now be explainedwith reference to FIGS. 1 through 16.

The laminated material with a curved surface according to the presentembodiment is used for example as the interior member of a railway car.FIGS. 13 through 16 show the example of a laminated material 170 with acurved surface formed according to the present embodiment constitutingthe interior portion of a railway car, mounted above a window 163 of acar body 160 to the ceiling 162. The laminated material 170 with acurved surface comprises, from the lower side thereof, a linear portion171, a curved portion 172, a linear portion 173, and a linear portion174. The material is bent approximately 90 degrees between the linearportion 173 and the linear portion 174. The upper and lower ends of thelaminated material 170 are equipped with brackets 176, 177, which arefixed to the car body 160 with screw. The brackets 176, 176 are eachfixed to the end portion of the laminated material 170 with a rivet andthe like. Reference number 166 is the interior member on the ceiling.

Plural number of laminated materials 170 are mounted along thelongitudinal direction of the car body 160. A black sponge-likecushioning pad 168 is arranged at the joint between a laminated material170 and another laminated material 170. The cushioning pad is arrangedin the space defined by surface plates 181, 182 and core materials 183.

The laminated material 170 comprises two surface plates 181 and 182, acore material 183 adhered to the two surface plates, a foam material 184filled inside the cells of the core material 183, and an interior member185 adhered to the surface plate 181 facing the interior of the car body(hereinafter called the inner-side surface plate).

The core material 183 is made of paper, and is formed by laminating aribbon bent in arc-like shapes from a single line. In FIG. 16, the areasshown by ο are connected using adhesives. The areas shown by Δ are notadhered together. A foam material 184 is filled inside the cells. Thedirection of bend of the laminated material 170 as explained in thefollowing is the left and right directions in FIG. 16.

The interior member 185 is a face sheet made of vinyl chloride, and isadhered to the surface plate 181. The interior member 185 can be madeusing materials such as paper, cloth, or resin. The surface plates 181and 182 are plates made of aluminum alloy and the like. The bracket 186is mounted to the member after the bending process.

The steps for manufacturing the laminated material 170 will now beexplained, wherein the material (raw material) is laminated at first.

First, a foaming resin material or an elastic foaming resin material andthe like is injected to the cells of the core material 183, and it isformed therein.

Next, the core material 183 (in which the resin is foamed) is mountedvia an adhesive on the surface plate 182, and then, the surface plate181 having adhesive applied to one end thereof is superposed to the corematerial 183, thereby adhering the three members together. The adhesiveis applied to the whole surface of the surface plate 182. The area towhich the adhesive is applied on the surface plate 181 is limited to therange of the linear portions 73 and 74. The area of the surface plate181 corresponding to the curved portion 172 and the linear portion 171is not adhered to the core material 183. The interior member 185 isadhered to the surface plate 181.

The size of the surface plates 181, 182 and the core material 183 isexplained. For example, the bend radius of the inner-side surface plateof the curved portion 172 is 150 mm, the bend angle is approximately 80degrees, and the thickness of the core material 183 is 39 mm. The size(width×length) of the core material 183 before the bending process is1.2 m×2.95 m, the size (width×length) of the surface plate 182 beforethe bending process is 1.2 m×3.0 m, and the size (width×length) of thesurface plate 181 before the bending process is 1.15 m×3.0 m. The widthsmentioned above refer to the direction that the laminated material 170is bent. The length of the surface plate 181 in the direction of bend isshorter than the length of the surface plate 182 or the core member 183.The surface plates 181 and 182 are made of aluminum alloy, and thethickness of the plates is 0.5 mm.

The end of the surface plates 181 and 182 at the side of the linearportion 174 and the end surface of the core material 183 aresubstantially at the same position. The end of the surface plate 182 atthe other end (at the side of the linear portion 171) and the endsurface of the core material are substantially at the same position. Theend of the surface plate 181 at this other end is receded from the endof the core material 183. When bending is performed as explained in thefollowing, said other end of the surface plate 181 reaches substantiallythe same position as the ends of the core member 183 and the surfaceplate 182. In other words, the position of the end of the surface plate181 is set back from the end surface of the surface plate 182considering the apparent length that the core material will shrink bythe bending process. Moreover, if there is a need to protrude said otherend of the surface plate 181 from the end of the core material 183, thelength of the surface plate 181 is set accordingly.

The width of the surface plates 181 and 182 are greater than the widthof the core material 183. The core material 183 is positioned at thecenter of surface plates 181 and 182.

Now, the bending method will be explained with reference to FIG. 1through FIG. 7. In FIG. 1, the laminated material 170 is mounted on thebending device with the interior member 185 (as for the surface plate,the surface plate 181) facing downward. The laminated material 170 isplaced on a base 21 of a bending jig 20, a fixing base 30, and a base 40for flexion bending. At this time, the upper surfaces of each of thebases 21, 30 and 40 are positioned in a horizontally linear state. Thebase 21 supports the end portion (the mounting side of bracket 186) ofthe linear portion 171 of the laminated material 170. The bases 30 and40 support the linear portions 173 and 174.

Each base 21, 22, 30 and 40 has a vacuum suction pad placed on thesurface to which the laminated material 170 contacts, and they arepositioned with predetermined intervals along the width direction of thelaminated material 170.

Next, a bending device 50 is lowered, then a bending roller 52 and apressing roller 53 is lowered, pressing the material with such a forceso as not to crush the core material 183. The lengths of the rollers 52and 53 exceed the width of the surface plate 182.

Next, after positioning the laminated material 170 to the predeterminedposition, the suction pad of the base 21 sucks the interior member 185downward.

Then, as shown in FIG. 2, the bending jig 20 is rotated with therotation center set to the center of the bend shape, winding theinterior plate 185 (the surface plate 181) around the bending jig 20.The bending jig 20 is rotated until the base 22 of the jig 20 movesupward and contacts the interior plate 185. Thereby, the base 22contacts the linear portion 173 of the laminated material 170. The base22 is positioned on the same plane as the bases 30 and 40.

At this state, the pressing roller 53 and the bending roller 52 contactthe laminated material 170, preventing the core material 173 and thesurface plate 181 from dropping to the right side.

After fixing the interior plate 185 to the bending jig 20, the bendingjig 20 is rotated so as to wind (bend) the interior plate 185 (includingthe surface plate 185) around the jig, so along with the rotation of thejig 20, the laminated material 170 is moved toward the direction ofrotation (rightward in FIG. 2). In order to facilitate the movement, thebases 30 and 40 should preferably be equipped with rollers to supportthe laminated material 170.

Next, the suction pad mounted to the base 22 sucks the interior plate185 downward. Moreover, the suction pad mounted to bases 30 and 40 suckthe interior plate 185 downward.

Since the bases 22, 30 and 40 pull the interior plate 185 (laminatedmaterial 170) downward, the laminated material 170 will not be displacedin the rightward direction.

When the base 22 sucks the interior plate 185, the bases 30 and 40 areplaced on the linear portions 173 and 174, respectively. The areabetween the bases 30 and 40 is the bend portion of the laminatedmaterial 170.

The curved surface 23 of the bending jig 20 between the base 21 and base22 to which the interior plate 185 contacts has the same radius as theradius of the curved surface portion 172 of the laminated material 170.The curved surface 23 is continuously formed along the width directionof the laminated material 170.

Next, as shown in FIG. 3, an adhesive is applied to the surface of theplate 181 facing the core material 183 through a nozzle 61 of anapplication device. This is performed by directing a nozzle 161 towardthe surface plate 181, and moving the same from one end of the laminatedmaterial 170 toward the other end thereof.

Thereafter, as shown in FIG. 4, the bending roller 52 and the pressingroller 53 are rotated so that the center of rotation is set to therotation center of the bending jig 20. The amount of rotation of therollers 52 and 53 are equal to the amount of rotation of the bending jig20, or in other words, the angle of the curved portion 172. Thereby, thecore material 183 (the surface plate 182) is wound around the surfaceplate 181, and the core material 183 is adhered to the surface plate181.

The pressing roller 53 prevents the member (core material 183, surfaceplate 182) wound around the surface plate 181 by the bending roller 52from separating from the plate 181 or the bending jig 20. A cylinderdevice 54 or a spring elastically supports the pressing roller 53.Therefore, even when rotated as shown in FIG. 4, the pressing roller 53always contacts the surface plate 182. Further, the rotary axis of thebending roller 52 is positioned along the vertical line passing therotary axis of the bending jig 20. The pressing roller 53 is placedleftward therefrom.

When the bending roller 52 rotates until the termination point of thecurved surface 172, a pressing pad 55 at the front end thereof isprotruded so as to press the surface plate 182 (the core material 183)of the linear portion 171 against the bending jig 20. The laminatedmaterial 170 of the linear portion 171 is pressed against the base 21.The material is maintained at this state until the adhesive iscompletely cured. The bending roller 52, the pressing roller 53 and thepressing pad 55 is mounted to a single rotation device. The length ofthe pressing pad 55 exceeds the width of the laminated material 170. Thepressing pad 55 is protruded by the cylinder device 56.

According to the embodiment, the core material 183 together with thesurface plate 182 is wound around the surface plate 181, so the corematerial 183 and the foam 184 inside the cells close to the surfaceplate 181 are compressed into the circumference direction, and collapsedor crushed. This absorbs the inner and outer circumferential differencescreated during the bending process.

Since the core material 183 is not collapsed in the thickness direction,the strength of the material is not deteriorated. Furthermore, no gap oroffset is generated between the surface plate 181 and the core material183.

According to experiment, if the material of the surface plates 181 and182 and the core material 183 are as mentioned, and when the cell sizeis 14 mm and the thickness of the core material 183 is 39 mm, thematerial can be bent to have an inner bend radius close to the thicknessof the core material, without deteriorating the quality of the material,such as the buckling of the core material 183 or the breakage of thecore material around the surface plate 182. This process enables tocreate a small radius bend. Therefore, the present embodiment enables tobend the laminated material 170 to have a relatively small bend radius.

Next, as shown in FIG. 5, a V-shaped cut is provided to the laminatedmaterial 170 using a circular saw 71 of a cutting device 70. Theposition to which the V-cut is provided is the flexion-bend position.The circular saw 71 cuts the surface plate 182 and the core material183, leaving the surface plate 181. The circular saw 71 is tiltedagainst the laminated material 170. After cutting one side of theV-shape, the circular saw 71 is rotated to cut the other side of the V.The cutting device moves along the line of bend.

The cutting process can be performed after holding the laminatedmaterial 170 with the pressing pad 55.

Then, the portion cut off by the V-shape cut is removed manually fromabove. Or, the portion is sucked from above by a suction pad and removedtherefrom. Or, the portion is pushed and removed from one end in thewidth direction of the laminated material 170 by a pusher.

Next, as shown in FIG. 6, adhesive is applied through an applicationdevice 80 to the space formed by the V-cut. The application device 80moves from one end in the width direction of the laminated material 170to the other end, applying the adhesive.

Then, as shown in FIG. 7, a bending base 40 rotates for a predeterminedangle centering around the vertex of the V-cut portion, thereby bendingthe laminated material 170. This state is maintained until the adhesivecures completely.

Thereafter, the suction performed by bases 21, 22, 30 and 40 isreleased. Then, the base 40 is returned to the parallel state. The benddevice 50 is removed from the laminated material 170.

Next, the bent laminated material 170 is removed from the bendingdevice.

Lastly, the bend device 50 is rotated to the original position.

Then, brackets 176 and 177 are mounted on the laminated material 170.

According to the above bending method, the interior material 185 can beadhered to the laminated material after the bending process. If there isa need to fold the end of the surface plate 181 toward the core material183, the end portion should be folded before the surface plate 181 isadhered to the core material 183.

According further to the embodiment, the non-bending areas of the twosurface plates and the core material are adhered together before thebending process, but it can be adhered later. For example, the adhesivecan be applied after bending the inner surface plate, and then one endof the core material having the outer surface plate adhered thereto canbe superposed to the inner surface plate, then the other end thereof canbe bent.

When melamine resin is used as the interior member 185, a crack can beformed to the bent portion when the base 40 performs the bendingprocess. In such case, after bending the member, a bent plate is adheredto the surface plates 181 and 182.

Other types of core material can be utilized as the core.

Next, the bending device used in the bending process will be explainedwith reference to FIGS. 8 through 12. FIG. 9 does not show theapplication device 60 b.

In FIG. 8, references 22 a, 30 a and 40 a are suction pads.

An axis 20 c is parallel to the axis 20 b of the bending jig 20. Theaxis 20 c is directly below the axis 20 b. Axes 20 b and 20 c areconnected at predetermined intervals along the axial direction byconnecting members 20 d. The connecting members 20 d can rotate againstthe axes 20 b and 20 c. The axis 20 b supports the bases 21 and 22 nearthe connecting members 20 d. A bed 20 x is placed under the axis 20 c.The lower surface of the connecting members 20 d are mounted on the bed20 through seats 20 y. Thereby, the bases 21 and 22 are prevented frombeing bent downward.

The upper surfaces of the connecting members 20 d are closer to the axis20 b than the base 21. Therefore, the surface of bases 21 and 22 areformed smoothly.

Four bases 20 f, 20 g, 20 h and 20 j support the ends of axes 20 b and20 c. A driving device 20 e for rotating the axis 20 b is mounted on thebase 20 f. The driving device 20 e does not rotate the axis 20 c. Thedriving device 20 e comprises a motor.

The bending roller 52, the pressing roller 53 and the pressing pad 55 ofthe bend device 50 are hung from a crossbeam 50 b. The crossbeam 50 b ishung from a crossbeam 50 d via an elevating device 50 c. The left andright ends of the beam 50 d are supported by both ends of axis 20 bthrough arms 50 e, 50 e.

The left and right ends of the crossbeam 50 b contact guide railsmounted to the inner sides of arms 50 e, 50 e. Thereby, even if thebeams 50 b and 50 d rotate, the position of the bending roller 52 andthe like is set to position at a predetermined distance from the axis 20b.

The arm 50 e is supported rotatably by the axis 20 b. A driving device50 g for rotating the arm 50 e is mounted to the base 20 j on the otherend of the axis 20 b. The driving device 50 g includes a motor. Theoutput of the driving device 50 g is transmitted through gears 50 h, 50j, axis 20 c, gears 50 k and 50 m to the right side arm 50 e. The gears50 j and 50 k are fixed to the axis 20 c. Thereby, the axis 20 c isrotated. Further, the gear 50 n mounted to the left side of the axis 20c rotates the gear 50 p at the left end of the axis 20 b. Thereby, thearm 50 e on the left end is also rotated. The gear 50 n is fixed to theaxis 20 c.

Two legs on the left and right sides are positioned near the axis 20 bof the left side of the arm 50 e. The gear 50 p is fixed to the leg nextto it (hereinafter called the one leg). The gear 50 p is rotatablysupported by the axis 20 b. The leg on the side of the driving device 20e (hereinafter called the other leg) is rotatably supported by the axis20 b. Thereby, the arm 50 e rotates against the axis 20 b along with therotation of the gear 50 p.

The right side arm 50 e has two legs on the left and right sides nearthe axis 20 b. The other leg on the arm 50 e on the side of the gear 50h is rotatably supported by the axis 20 b. The gear 50 h is rotatablysupported at the end portion of the axis 20 b. The gear 50 h isconnected to the output shaft of the driving device 50 g. The end ofaxis 20 b is supported by the base 20 j through gear 50 h, the outputshaft of the driving device 50 g, and the body of the driving device 50g. The gear 50 h is not fixed to said one leg.

The leg on the side of the gear 50 m (hereinafter called the leg on theother side) is fixed to the gear 50 m. The gear 50 m is rotatablysupported by the axis 20 b. Thereby, the rotation of the gear 50 hrotates the arm 50 e against the axis 20 b via the gear 50 j, 50 k, and50 m.

Thereby, the left and right arms 50 e, 50 e rotate in synchronism.Further, when the driving device 50 g stops the rotation, the arms 50 emaintain their state.

The bending roller 52 is divided into plural areas along thelongitudinal direction of the crossbeam 50 b. It is hung from thecrossbeam 50 b at the divided areas.

The pressing roller 53 is divided into plural areas along thelongitudinal direction of the crossbeam 50 b. It is hung from the beam50 b at the divided areas via a cylinder device 54. The tip of the rodon the cylinder device 54 supports the axis of the roller 53.

The pressing pad 55 is hung from the beam 50 b through the cylinderdevice 56 at plural areas along the longitudinal direction of the beam50 b.

The application device 60 b is mounted on a rail 60 d of the base 20 x.The application device 60 b moves from one end in the width direction ofthe bending jig 20 toward the other end thereof.

The cutting device 70 and the application device 80 are mounted above aframe 70 b. The frame 70 b moves from one end of the bending jig 20 inthe width direction toward the other end thereof along a rail 70 x on aframe 40 d. The rail 70 x supports the frame 70 b so that it will notfall down.

The application device 60 b and the frame 70 b can be receded so as notto bump into the width-direction end of the laminated material 170.

Semicircular flanges 40 b are mounted to the left and right ends of thebending base 40. Each flange 40 b is supported by the base 40 f mountedto the base 20 x. The base 40 f is equipped with plural rollers 40 g, 40h. The roller 40 g supports the lower surface of the flange 40 b. Theroller 40 h contacts the upper surface of a guide rail 40 c of theflange 40 b. Further, the base 40 positioned between the left and rightflanges 40 b, 40 b is equipped with flanges protruding downward inpredetermined intervals. The lower surface of these flanges aresupported by a roller mounted to the base 40 f. This enables the flange40 b and the base 40 to rotate around a single rotary center withoutfalling from the base 40 f.

A gear 40 d is mounted to left and right flanges 40 b. The gear 40 dshould be enough to cover the rotary angle of the base 40. A pinion gear40 j engaged to the gear 40 d is equipped to the base 40 f. The gear 40j is rotated by an axis 40 k equipped to the base 40 f. Reference 40 mis a driving device that rotates the axis 40 k.

The base 30 is mounted to the frame 40 d.

When the bases 20 f, 20 g, 20 h and 20 i of the bending jig 20 isrelatively moved against the frame 40 d so as to vary the distancebetween the bases and the frame, a laminated material having a varieddistance between the arc-shaped curved portion and the flexion bendportion can be manufactured. For example, the bases 20 f, 20 g, 20 h and20 i can be moved along a rail. When the radius of the bending jig 20differs, the height of the bases 20 f, 20 g, 20 h and 20 i can bevaried.

The technical scope of the present invention is not limited to the termsused in the claims or in the summary of the present specification, butis extended to the range in which a person skilled in the art couldeasily substitute based on the present disclosures.

According to the present invention, the core material and the outersurface plate are bent after the inner surface plate is bent into anarc, so a laminated plate having a relatively small bend radius for itsthickness is easily obtained.

1. A method of bending a laminated material comprising: while one end ofa first surface plate of a laminated material having a first surfaceplate and a second surface plate respectively adhered to both sides of acore material is fixed on a base, moving the other end of said firstsurface plate and bending it into an arc-shape, thereby separating saidfirst surface plate at said other end from both said core material andsaid second surface plate; and while the one end of the core materialand a second surface plate adhered to said core material is adhered tothe one end of said first surface plate, moving and bending the otherend of said core material and said second surface plate along said firstsurface plate being bent, and adhering said core material to said firstsurface plate.
 2. A method of bending a laminated material according toclaim 1, wherein said second surface plate extends beyond said firstsurface plate at the other end of the first surface plate.
 3. A methodof bending a laminated material according to claim 2, wherein saidsecond surface plate extends beyond the first surface plate such thatafter moving and bending the other end of the core material and thesecond surface plate, the other ends of the first and second surfaceplates are in substantially a same plane.
 4. A method of bending alaminated material according to claim 1, wherein the other end of thecore material and the second surface plate are moved and bent together,along said first surface plate being bent.
 5. A method of bending alaminated material comprising: while one end of a first surface plate ofa laminated material having a first surface plate and a second surfaceplate respectively adhered to both sides of a core material is fixed ona base, moving the other end of said first surface plate and bending itinto an arc-shape, thereby separating said first surface plate at saidother end from both said core material and said second surface plate;after moving the other end of said first surface plate and bending itinto an arc-shape, applying an adhesive to either one of the contactsurfaces between said first surface plate and said core material at theother end of the first surface plate; and while the one end of the corematerial and a second surface plate adhered to said core material isadhered to the one end of said first surface plate, moving and bendingthe other end of said core material and said second surface plate alongsaid first surface plate being bent, and adhering said core material tosaid first surface plate.
 6. A method of bending a laminated materialcomprising: mounting a laminated material having a first surface plateand a second surface plate respectively adhered to both sides of a corematerial to at least one first base positioned along the horizontaldirection; thereafter, fixing one end of said laminated material to saidat least one first base; while said one end of said laminated materialis fixed on said at least one first base, moving and bending the otherend of said first surface plate toward the direction separating fromsaid core material, thereby separating said first surface plate at saidother end from both said core material and said second surface plate;applying an adhesive by spraying to either one of the contact surfacesbetween said first surface plate and said core material at the other endof the first surface plate; and moving and bending said other end ofsaid core material and said second surface plate along said firstsurface plate being bent, and adhering the other end of said corematerial to said first surface plate, wherein the bending of said firstsurface plate is performed by sucking the other end of the first surfaceplate by an arc-shaped second base positioned at the other end of thefirst surface plate, and, after fixing said other end of the firstsurface plate to the second base, rotating said second base on the otherend of the first surface plate so that the other end of said firstsurface plate is moved toward the direction separating from said corematerial.
 7. A method of bending a laminated material according to claim6, wherein the bending of said core material and said second surfaceplate is performed by moving a roller from the one end of the secondsurface plate toward the other end thereof, and at the same time, movingsaid roller toward said first surface plate.
 8. A method of bending alaminated material according to claim 6, wherein, in said laminatedmaterial, adhesive is provided on the whole surface of the secondsurface plate contacting the core material, and adhesive is provided onthe surface of the one end of the first surface plate contacting thecore material and not on other parts of the surface of the first surfaceplate contacting the core material.
 9. A method of bending a laminatedmaterial according to claim 8, wherein said other parts of the surfaceof the first surface plate contacting the core material, for whichadhesive is not provided, includes an area of the surface of the firstsurface plate which is bent when performing said moving and bending theother end of the first surface plate.
 10. A method of bending alaminated material comprising: while one end of a laminated material,having a first surface plate and a second surface plate respectivelyadhered to both sides of a core material, is fixed on at least one firstbase, moving and bending the other end of said first surface platetoward the direction separating from said core material, therebyseparating said first surface plate at said other end from both saidcore material and said second surface plate; applying an adhesive byspraying to either one of the contact surfaces between said firstsurface plate and said core material at the other end of the firstsurface plate; and moving and bending said other end of said corematerial and said second surface plate along said first surface platebeing bent, and adhering the other end of said core material to saidfirst plate, wherein the bending of said first surface plate isperformed by sucking the other end of the first surface plate by asecond base positioned at the other end of the first surface plate, andmoving said second base on the other end of the first surface plate sothat the other end of said first surface plate is moved toward thedirection separating from said core material, and wherein the bending ofsaid core material and said second surface plate is performed by movinga roller from the one end of the second surface plate toward the otherend thereof, and, at the same time, moving said roller toward said firstsurface plate.
 11. A method of bending a laminated material according toclaim 10, wherein the one end of said first surface plate is fixed tosaid at least one first base during the bending of said first surfaceplate by pressing said laminated material onto said at least one firstbase by said roller.
 12. A method of bending a laminated materialaccording to claim 10, further comprising, prior to said moving andbending the other end of said first surface plate, mounting saidlaminated material to said at least one first base, positioned along thehorizontal direction, and thereafter fixing said one end of saidlaminated material to said at least one first base.
 13. A method ofbending a laminated material comprising: while one end of a firstsurface plate of a laminated material having a first surface plate and asecond surface plate respectively adhered to both sides of a corematerial is fixed on a base, moving the other end of said first surfaceplate and bending it into an arc-shape, thereby separating said firstsurface plate at said other end from both said core material and saidsecond surface plate; and while the one end of the core material and asecond surface plate adhered to said core material is adhered to the oneend of said first surface plate, moving and bending the other end ofsaid core material and said second surface plate along said firstsurface plate being bent, crushing the first surface plate side portionof said core material in the direction of the bend, and adhering saidcore material to said first surface plate.
 14. A method of bending alaminated material comprising: while one end of a first surface plate ofa laminated material having a first surface plate and a second surfaceplate respectively adhered to both sides of a core material is fixed ona base, the core material including a plurality of cells, moving theother end of said first surface plate and bending it into an arc-shape,thereby separating said first surface plate at said other end from bothsaid core material and said second surface plate; and while the one endof the core material and a second surface plate adhered to said corematerial is adhered to the one end of said first surface plate, movingand bending the other end of said core material and said second surfaceplate along said first surface plate being bent, crushing the firstsurface plate side portion of said core material and a foam memberfilling the plurality of cells of said core material in the direction ofthe bend, and adhering said core material to said first surface plate.